Centrifugal pump



March 2, 1948. J. F. LEACH CENTRIFUGAL PUMP 2 Sheets-Sheet 1 Filed larch 2, 1946 Inm'utor @niftlieaak M March 2, 1948. J. F. LEACH CENTRIFUGAL PUMP Filed March 2. 1946 2 Sheets-Sheet 2 I- Ill l'lllll'lllll lllllll I I lure/nor bknzfzeaak a: a? 1! MW 3 discharged.

Patented 2, 1948 UNITED STA'If ES PATENT} OFFICE Applica t lfi i ltfar cl g l g fzl 63,527

1 r This invention relates to a centrifugal pump and has for its primary object the displacement of fluid.

Another object is to extract fluid from a container and discharge it in a substantially horizontally disposed orbit over a wide area. I

The above and other objects may be attained by employing this invention which embodies among its features a chamber rotatable about a vertical axis, upwardly and outwardly extending fluid discharge nozzles opening into .the chamber near its lower end, an axially disposed fluid inlet pipe extending through the'bottom of said chamber and opening into said chamber near its upper end and means for rotating the chamber about its axis whereby centrifugal discharge of fluid through the nozzles will create a flow of fluid through the pipe and into the chamber to replace the fluid so Other features include means for priming the pump.

In the drawings: A Figure 1 is a vertical sectional view through a pump embodying the features of this invention,

- Figure 2 is a top plan view of Figure 1,

Figure 3 is a horizontal sectional view taken substantially along the line 33 of Figure 1,

Figure 4 is a horizontal sectional view taken substantially along the line 44 of: Figure 1,

Figure '5 is a vertical sectional view through a modified form of pump embodying the features of this invention,

Figure 6 is atop plan view of Figure 5, and

Figure 7 is a horizontal sectional view taken substantially along the line 1-1 of Figure 5.

Referring tothe drawings in detail this improved pump designated generally I comprises a closed chamber formed of a tubular body llhaving a bottom wall [2 and closed atits upper end by a suitable plug l3. Extending into the chamber adjacent its lower end are radially disposed pipes I4 to the outer ends of which are connected upwardly and outwardly inclined discharge nozzles I5. The plug l3 closing the upper end of the tubular body H is provided with an axial opening I6, and extending through the chamber axially thereof is an inlet pipe I! the lower end of which extends through an axial opening I8 formed in the bottom wall l2, while its upper end extendsthrough the opening I6.

The pipe is provided adjacent its upper end with f external screwthreads for cooperation with a clamping nut I9 by means of which the plug I3 is held in proper position in the upper end of the body II. The junction of the pipe 11 and the 3 Claims. (01. 103-113) bottom wall l2 of the tubular body I l is sealed in any suitable manner as by brazing or soldering to form a fluid-tight junction at this point. A suitable partition wall 20 extends across the pipe I! in spaced relation to its upper end to form a priming, chamber 2| which communicate with the interior of the body ll through a port 22. Radial discharge ports 23 are formed in the pipe I! immediately below the partition wall 20 to permit fluid flowing through the pipe to enter the chamber ll. 7

Surrounding the lower end of the pipe I! which projects beyond the lower end of the chamber I0 is a tubular supporting member 24 provided at its upper and lower ends with bearing bushings 25 and 25' in which the pipe I1 is rotatably supported, and secured to the pipe between the uppermost bushing 25 and the bottom of the chamber I9 is a drive pulley 26 by means of which the assembly just described may be rotated in the supporting members 24. A thrust washer 26' is interposed between the pulley 26 and the bushing 25.

The upper ends of the pipe II which projects through the opening it is closed by a suitable screw plug 21 when the pump is'in operation.

In the modification oi the device illustrated in and body at 35 is soldered or brazed in order to form a fluid-tight joint. A pulley 36 is secured to the pipe 34 immediately adjacent the bottom wall 39 of the cylinder 29 by means of which the cylinder may be rapidly rotated.

Formed at radially spaced points adjacent the bottom end of the cylinder are openings or'ports which lead to radially and upwardly extending discharge pipes 31 which are connected at their upper ends to priming chambers 39, the connection being such that rapid rotation of the cylinder 29 will cause the discharge of fluid contained therein into the chambers 28 through centrifugal action. Suitable brackets 39 join the upper ends or the cylinders 29 with the chambers 38 and leading upwardly and outwardlyfrom the upper -ends of the chambers 32 are discharge tubes 49 bushing 42.

As illustrated in Figure 5 the lower end or the pipe 34 rides in bearing bushings 42 and 42' which are carried in any suitable tubular support 43, and formed in the pipe 31 near the plug 32 at the upper end of the cylinder 29 are radial ports 44 through which fluid flowing up the pipe 34 is discharged into the chamber. -A thrust washer 36' is interposed between the pulley 26 and the A partition wall 45 is arranged in the pipe immediately above the ports 44 and formed in the pipe immediately above the partition wall is an annular row of spaced ports 46 which establish communication from the pipe to the interior of the chamber 28. A nut 41 is threaded on the outside of the pipe 34 adjacent its upper end and serves to hold the plug 32 in proper position on the cylinder 29 to form a closed chamber as will be readil understood as upon reference to Figure 5. The extreme upper end of the pipe 34 is closed by a plug 48 which is removable for the purpose of introducing priming fluid into the pump prior to the initial starting thereof In operation it will be understood that as the pulley 26 of the pump I I] is driven, the chamber II will be rapidly rotated about its longitudinal axis. If the plug 21 is removed and priming fluid introduced into the chamber and the plug then replaced it'will be obvious that the rapid rotation of the cylinder II will cause the fluid contained therein to be discharged through the nozzles I5. By immersing the lower end of the pipe IT in a body of liquid it is obvious that as the liquid is discharged from the interior of the chamber a flow of liquid through the pipe I! will be established so that the liquid will be drawn from the pool in which the lower end of the pipe is immersed and. discharged through the. ports 23 into the interior of the chamber so as to maintain a continuous flow of fluid through the nozzles i5 so long as the pump remains in operation, and so long as the lower end of the pipe l1 remains immersed in the liquid. In this type of device it is necessary before starting the pump in each case to introduce liquid into the chamber and to this end, the plug 21 is removed and the liquid poured into the chamber 2| to be discharged through the port 22 into the chamber 10, thus priming the pump.

In the modified form of this device illustrated in Figures 5 through 7 inclusive the rapid rotation of the pulle 36 will cause the chamber 28 to be rotated and the liquid will be discharged 4 tion and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed,

What I claim is:

1. A centrifugal pump comprising a tubular supporting member, a feed pipe, one end of the feed pipe being mounted in the tubular s pporting member to rotate about its longitudinal axis, an elongated tubular chamber carried by and enclosing a portion of the feed pipe that projects beyond the supporting member, said feed pipe having radial openings near its end remote from the supporting member, said openings establishing communication between the pipe and the chamber, discharge nozzles radiating from the tubular chamber adjacent the end nearest the supporting member and means on' the pipe between the supporting member and the chamber to impart rotary motion to the feed pipe and the chamber.

2. A centrifugal pump comprising a tubular supporting member, a feed pipe, one end of the feed pipe being mounted in the tubular supportin-g member to rotate about its longitudinal axis,

an elongated tubular chamber carried by and enclosing-a portion of the feed pipe that projects beyond the supporting member, said feed pipe having radial openings near its end remote from the supporting member, said openings establishing communication between the pipe and the chamber, discharge nozzles radiating from the tubular chamber adjacent the end nearest the supporting member and means on the pipe between the supporting member and the chamber to impart rotary motion to the feed pipe and the chamber, the upper end of the feed pipe proiecting beyond the upper end of the tubular chamber, a wall between the radial openings to form a priming chamber, said pipe having a from the lower ends thereof through the pipes 31 into the priming chambers 38 and from thence through the discharge tubes 40 outwardly through the nozzles 4i. Such displacement of the liquid will cause the liquid in which the lower end of the pipe 34 has been immersed to flow upwardly through the pipe and be discharged through the ports 44 in order to replace the liquid which has been displaced through the discharge nozzles. Obviously due to the fact that the priming chambers 38 are arranged so as to avoid the complete discharge of the liquid through the nozzles 4| it is unnecessary to prime the pump each time it placed into operation, though priming may be effected by removing the plug 48.

While in the foregoing there ha been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combinapriming opening extending between the priming chamber and the tubular chamber and the tubular chamber and a plug removably entered into the upper end of the pipe to close the upper end of the priming chamber.

3. A centrifugal pump comprising a tubular supporting member, a feed pipe, one end of the feed pipe being mounted in the tubualr supporting member to rotate about its longitudinal axis, an elongated tubular chamber carried by and enclosing a portion of the feed pipe that projects beyond the supporting member, said feed pipe having radial openings near its end remote from the supporting member, said openings establishing communication between the pipe and the chamber, discharge nozzles radiating from the tubular chamber adjacent the end nearest the REFERENCES CITED The following references are of "record in the file of this patent:

FOREIGN PATENTS Country Date Great Britain Nov. 29, 1906 Number 5,547 

